Brick-kiln.



y W. P. GRATH.

BRICK KILN.

APPLICATION FILED 23.11, 1911.

Patented JulySO, 1912.

'UNTTED sTATns PATENT omnes.y

WALTER P. GRATI-I, OF ST. LOUIS, MISSOURI.

BRICK-KILN.

T0 all fai/rom t may concern:

Be it known that I, WALTER P. GRATH, a citizen of the United States, and a resident of the city of St. Louis and State of Missouri, have invented a new and useful Improvement in Brick-Kilns, of which the following is a specification.

This invention relates to kilns and more particularly to continuous kilns for burning'bricks, tiles, and the like.

It has for its principal objects to secure a simple and inexpensive structure, to save fuel, to secure a uniform burning of the ware, and to attain certain advantages which will hereinafter more fully appear.

rlhe invention consists in the parts and in the arrangements and combinations of parts hereinafter described and claimed.

1n the accompanying drawing which forms part of this specification and wherein like symbols refer to like parts wherever they occur, Figure 1 is a vertical sect-ion taken on or about the line y-g/ of Fig. 2;

and Fig. 2 is a horizontal section, the upv per half of the figure being taken on or about the line and the lower half of the figure being` taken on or about the line e-e of Fig. 1.

The kiln is arranged as a connected se-` ries of burning chambers, preferably in a straight row or rows. As shown in the drawing, the respective burning chambers 1 are arched transversely of the row, and each chamber is provided at its opposite ends with doorways 2 through which the bricks, tiles, or other ware are placed into and removed from the kiln. In each end wall of the kiln, on opposite sides of the doorway, are furnaces, the same being arranged either for coal, oil, gas, or other suitable fuel. The respective furnaces 3 open into bags 4L through which the products of combustion enter the chamber 1 above the bag walls 5. At each side o-f the burning chambers are bags 6 whose walls 7 extend to approximately the same plane with the upper edge of the bag walls 5. The lower portions of the bags 6 constitute fue-l chambers which are open at their opposite ends as at 8. i

rlhe bottoms or floors of the kiln cham- Specification of Letters Patent.

Application filed February 11, 1911.

Patented July 30, 1912. Serial No. 608,000.

bers 1 are formed hollow. That is, the iioors are provided with alternately disposed perforated and imperforate or radiating iues j 9 and 10, respectively. rlhese iiues extend transversely of the arched burn ing chambers, but lengthwise of the row of chambers, and the perforated flue of one chamber is in lineand in direct communication with the radiating flue of the adjacent burning chamber on oneside. row of burning chambers, the communicatio-n between a perforated flue of one chamber and the radiating flue of an adjoining chamber is established in one ,direction only throughout the entire row. In other words, provision is made for conducting the products of combustion or waste gases and heat from the chambers successively to the adjoining chamber in one `direction from one end of the row of chambers to the other; and when the chambers are arranged in two parallel rows, communication is established between the perforated and radiating iues of the adjacent endmost chambers by cross flues 11 connected to exit lues 14. The division walls between the respective burning chambers and also the walls at the ends of the row are provided with vertical flues 12, which communicate with the radiating flues 10 of the respective burnin chambers and open into the bags 6 of said chambers above the fuel in said bags, as at Thatl is, in a` 13. Each of the burning chambers is prov and closed as desirable or necessary in operating the kiln.

lln the operation of the kiln, when one of the chambers is being tired, the damper 18 in its exit flue 14 may be closed, and the damper in the exit flue of the chamber to the right or on that side of t-he chamber which is being` fired whose radiating flues 10 communicate with the perforated flues 9 of said chamber being fired is opened. The products of combustion from the furnaces 3 and bags 6 are drawn through the perforations into the respective perforated flues, thencethrough the imperforate radiating iues, thence up through the openings 12 and 13 and over the bag walls 7 at opposite sides of the adjacent chamber 1, and thence down through the perforated iiues of said adjacent chamber and out through its eXit Hue 14 to the exhaust fan or stack 17. Hence, the products of combustion or waste heat from the fired chamber is utilized in the preliminary heating of an adjoining chamber on one side; while the waste heat from a cooling chamber on its opposite side, which has been previously fired, aids in the combustion of the tired chamber. That is, outside air is drawn in through the cooling chamber, and being heated by the previously fired chamber and burned ware therein, it is conducted for a considerable period thro-ugh. the perforated flues of said cooling chamber into the radiating flues of the chamber being fired and up over the fuel in the bags 6 of said chamber, thereby materially promoting the combustion, whether the fuel be coal, oil or gas.

By the arrangement of alternating perforated and radiating iues in the floor of each chamber, and having the perforated flue of one chamber communicating direct-ly with the radiating flue of an adjoining chamber on one side only, the communication is direct between said coperating flues of two able to provide furnaces having grates at the openings 8 at the opposite ends of the bags 6 and also in the furnaces 3. However, coal may be thrown onto the bottoms of the bags 6 and the draft through the openings 8 will be sufficient to promote combustion, especially as the heated air from the adjoining cooling chamber may be conducted into the fired chamber through the iues 10 and 12 and openings labove the body of fuel. So, too, the kiln chambers may be fired from both ends and the ashes can be easily removed from the bags 6.

In some cases, the imperforate radiating iiues may communicate direct into thc bottoms of the bags 6. In such cases the flues 12 and openings 13 in the division walls may be eliminated; and obviously, the kiln admits of considerable further modification without departing from my invention. Therefore 1 do not wish to be limited to the specific construction and arrangementshown.

What I claim is:

1. A continuous kiln comprising a series of adjoining burning chambers, each of said chambers being provided on opposite sides adjacent to the respective division walls with bags whose lower portions constitute a furnace, the floors of said chambers being provided with a multiplicity of longitudinal iiues, the floors having amultiplicity of openings communicating with alternate fines, the open Hoor flues of the respective chambers being direct continuations of the imperforate iioor flues of the adjoining burning chambers, the division walls between said chambers having uptake flues therein communicating at their lower ends with the respective imperforate ioor iues and at their upper ends with the respective bags above the lower portions thereof.

2. A continuous kiln comprising a series of adjoining burning chambers, each of said chambers being provided on opposite sides adjacent to the respective division walls with bags whose lower portions constitute a furnace, the lioors of said chambers being provided with a multiplicity of longitudinal flues, the floors having a multiplicity of openings communicating with alternate flues, the open floor iues of the respective chambers being direct continuations of the imperforate floor iues of the adjoining burning chambers, the division walls between said chambers having uptake iiues therein communicating at their lower ends with the respective imperforate iioor iues and at their upper ends with the respective bags above the lower portions thereof, the side wall of the kiln being provided with openings communicating with the ends of said bags at the lower portion thereof.

3. A continuous kiln comprising a series of adjoining burning chambers, each of said chambers being provided on opposite sides adjacentto the respective division walls with bags whose lower portions constitute a furnace, the iioors of said chambers being provided with a multiplicity of longitudinal flues, the floors having a multiplicity of openings communicating with alternate iiues, the open floor iues of the respective chambers being direct continuations of the imperforate iioor flues of the adjoining burning chambers, the division walls between said chambers having uptake iues therein communicating at their lower ends with the respective ilnperforate floor flues Signed at St. Louis, Missouri, this 7th day and at their upper ends with the respective of February, 1911. bags above the lower portions thereof, draft f VALT'ER P. GRATH. creating means for the respective burning chambers connected with the open floor fiues Vit-nesses: thereof, and means for controlling` the draft Gr. A. PENNINGTON, of said chambers individually. M. A. SHnLToN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents.

f Washington, D, C. 

